package com.wenbiao.springcloud.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

//@Component
public class ErroFilter extends ZuulFilter {

    private static final Logger logger= LoggerFactory.getLogger(ErroFilter.class);


    @Override
    public String filterType() {
        return "error";
    }

    @Override
    public int filterOrder() {
        return 1;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() throws ZuulException {
        try {
            RequestContext context=RequestContext.getCurrentContext();
            ZuulException exception= (ZuulException) context.getThrowable();

            logger.error("进入系统异常拦截:"+exception);

            HttpServletResponse response=context.getResponse();
            response.setContentType("application/json;charset=utf-8");
            response.setStatus(exception.nStatusCode);
            PrintWriter writer=null;
            try {
                writer=response.getWriter();
                writer.print("{code:"+exception.nStatusCode+", message:\""+exception.getMessage()+"\"}");
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if (writer!=null){
                    writer.close();
                }
            }
        } catch (Exception e) {
            ReflectionUtils.rethrowRuntimeException(e);
        }

        return null;
    }
}
